X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Fcgroup-util.c;h=309f65d03eefc0cff9c046db035883565b9fdcc9;hb=0371ca0dac1d70b2e5060a3c4e6fbbc2bdbd8671;hp=4e0211a7a04758c12c292064020c476972b81509;hpb=9588bc32096fc8342bfd8b989689717186d7d86e;p=elogind.git

diff --git a/src/shared/cgroup-util.c b/src/shared/cgroup-util.c
index 4e0211a7a..309f65d03 100644
--- a/src/shared/cgroup-util.c
+++ b/src/shared/cgroup-util.c
@@ -480,7 +480,7 @@ static int join_path(const char *controller, const char *path, const char *suffi
 
 int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
         const char *p;
-        static __thread bool good = false;
+        static thread_local bool good = false;
 
         assert(fs);
 
@@ -1082,42 +1082,42 @@ int cg_get_root_path(char **path) {
         return 0;
 }
 
-int cg_pid_get_path_shifted(pid_t pid, char **root, char **cgroup) {
+int cg_pid_get_path_shifted(pid_t pid, const char *root, char **cgroup) {
         _cleanup_free_ char *cg_root = NULL;
         char *cg_process, *p;
         int r;
 
-        r = cg_get_root_path(&cg_root);
-        if (r < 0)
-                return r;
+        assert(pid >= 0);
+        assert(cgroup);
+
+        if (!root) {
+                /* If the root was specified let's use that, otherwise
+                 * let's determine it from PID 1 */
+
+                r = cg_get_root_path(&cg_root);
+                if (r < 0)
+                        return r;
+
+                root = cg_root;
+        }
 
         r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &cg_process);
         if (r < 0)
                 return r;
 
-        p = path_startswith(cg_process, cg_root);
-        if (p)
-                p--;
-        else
-                p = cg_process;
+        p = path_startswith(cg_process, root);
+        if (p) {
+                char *c;
 
-        if (cgroup) {
-                char* c;
+                c = strdup(p - 1);
+                free(cg_process);
 
-                c = strdup(p);
-                if (!c) {
-                        free(cg_process);
+                if (!c)
                         return -ENOMEM;
-                }
 
                 *cgroup = c;
-        }
-
-        if (root) {
-                cg_process[p-cg_process] = 0;
-                *root = cg_process;
         } else
-                free(cg_process);
+                *cgroup = cg_process;
 
         return 0;
 }
@@ -1337,36 +1337,41 @@ int cg_pid_get_session(pid_t pid, char **session) {
 
 int cg_path_get_owner_uid(const char *path, uid_t *uid) {
         _cleanup_free_ char *slice = NULL;
-        const char *e;
+        const char *start, *end;
         char *s;
+        uid_t u;
         int r;
 
         assert(path);
-        assert(uid);
 
         r = cg_path_get_slice(path, &slice);
         if (r < 0)
                 return r;
 
-        e = startswith(slice, "user-");
-        if (!e)
+        start = startswith(slice, "user-");
+        if (!start)
                 return -ENOENT;
-        if (!endswith(slice, ".slice"))
+        end = endswith(slice, ".slice");
+        if (!end)
                 return -ENOENT;
 
-        s = strndupa(e, strlen(e) - 6);
+        s = strndupa(start, end - start);
         if (!s)
-                return -ENOMEM;
+                return -ENOENT;
+
+        if (parse_uid(s, &u) < 0)
+                return -EIO;
 
-        return parse_uid(s, uid);
+        if (uid)
+                *uid = u;
+
+        return 0;
 }
 
 int cg_pid_get_owner_uid(pid_t pid, uid_t *uid) {
         _cleanup_free_ char *cgroup = NULL;
         int r;
 
-        assert(uid);
-
         r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
         if (r < 0)
                 return r;